direct/line out from an amp (link) need help

[cedric]

just stumbled over the 'switchable speaker line-out' here:
http://www.lynx.bc.ca/~jc/pedals.html (down a few notches).
but there's no info on it - or a schem.
the idea sound REALLY nice and i could really use this.

sending amp-tone to other effects and sending them to the PA.
or on to a different amp.

there's a volume pot in his box/idea - which would be for changin between:
1) sending to other amps (volume high) or
2) sending to pedals (volume low)

but there's no schematic there.
any help?

- ced